Buffer



S. GROSS BUFFER Filed Nov. 26, 1927 entered rat. is, rate warren stares raranr caries QIEGFRL'EH GROSS, F ESSEN, GERMANY, ASSIGNOR TO FRIED. KRUPIP AK'IIENGESELL SGHA'EL, OF ESEN0N-THE-RUHR, GERMANY BUFFER Application filed November cc, 1927, Serial No. $235,874, and in Germany-January 13, 192?.

the buffer is compressed. The objects of this invention are to so improve bufiers of this type, that a possible locking of the friction surfaces against one another is eliminated, and to insure the return of the friction brake to its initial position. Some preferred. embodiments of a buffer desi ed in accordance with this invention are lllustrated, by way of example, in the drawing which accompanies and forms part of this specification. In this drawing:

Figure 1 is a sectional-view throu h the axis of a buffer according to one embo iment of my invention,

Figure 2 shows a detail of the embodiment illustrated in Figure 1, in front view,

axis of a buffer according to a second embodiment of my invention, and Figure 4 is a sectional view of a buffer according to a third embodiment of my inven- -3 tion,

Figure 5 is a sectional view of Figure 4 taken along line 55. i Y

Referring first to'the embodimentshown in Figure 1, A denotes the bufi'e'rcase and C the buffer plunger having the. usual head S. Plunger C extends through a tube B also fast on head S.' One end of thebuffer spring D abuts on a flan e 0 of plunger C. The other end of spring abuts on a. ring E which has a conical surface (5. A split ring, F, made of cast iron or some other suitable material, is slid on plunger 0, which ring has inclined surfaces f and j The ring F has further end beyond the corresponding inclined surface 7. The inclined surface 7 is permanently in contact with the inclined surface '6 of ring E while the surface f? is in permanent contact with an inclined surface 9 of a third Figure 3 is a sectional view through the such a width, that it projects notably on one ring G abutting on the base plate bufier. y

when the buffer is compressed, the plunger C is shifted relatively to case A andcompresses spring D. In consequence thereof the mclined surfaces 6 and g exert an increased pressure upon ring F and cause the latter to contract in diameter, so that ring F abuts on plunger C with increased friction and exerts a powerful braking action upon the plunger. cc Upon 'the buffer. compression ceasing, ring F reverts to its original shape according is the decreasing pressure exerted by spring D, so that this spring is able Jto return the plunger to its initial position; As one end as of ring F projects somewhat beyond the inclined surface f ring F is unable to cant' H of the when the buffer is compressed. On the contrary, it closely abuts plunger C, so that a uniform distribution of the pressure and a uniform wear of the friction surfaces is obtained and any. clampingv or looking is avoided. I In the embodiment illustrated in Figure 3 the split ring K abuts on the inner surface 7 of the plunger L, so that the tube B of Fig. 1 becomes a plunger and the member G is rendered superfluous. Besides, the ring K projects on both sides beyond the inclined surfaces. As to the rest of the bufler shown in 30 Figure 3, it acts in the same manner as that of the first embodiment.

In the embodiment illustrated in Figures 4 and 5-, a rod M is fixed in the buffer case. A cylinder N composed of two semi-cylindrical sections is carried on rod M by means of a collar m and ahead MP. A split sleeve 0 is guided on cylinder N, and carries two split rings P and P Sleeve 0 projects at both'ends beyond the rings P, P. These two rings are so connected with sleeve 0, for example by means of pins, that they may be bent in radial direction relatively to sleeve 0, but are unable to shift axially. The rings P, P have further radial recesses 1) see Figure 5, which lower their resistance to bendin Inclined surfaces provided on the rin s P, P engage inclined surfaces of rings Q? and B. When the buffer is compressed,

the rings Q, Q, R are foroe dtogether. This causes the rin P, P to bend, which in turn cause sleeve O to bend. Sleeve then presses against cylinder N reducing a brakmg action. The'rest of t ebufler operates in the same manner'as'that of the first em-- ters patent, is

bodiment.

What I claim and desire to secure Let-,-

In a device of the kind described, a base,

a brake member fixed to said base, a friction member concentric with said brake membcr, slidable theron and resilient in radial direction, a buffer head, an abutment fixed to said head, 'a spring'resting on said base a loose abutment between and sprinf and said fixed abutment, said loose an fixed abutments having oppositely inclined adjacent faces, and an mtermediate radially yieldable member between said abutments and said friction member concentric to the latter and having inclined faces abutting against the faces of said abutments.

The foregoing sgecifica'tion signed at Cologne, Germany,t is. 2nd, day of Novem-.

ber, 1927. v

' SIEGFRIED GROSS.

said 

